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| Douglas S Bell | Division of General Internal Medicine & Health Services Research, David Geffen School of Medicine at university of california los angeles |
| Douglas S Bell | Clinical and Translational Science Institute, university of california los angeles |
| Ron D Hays | Division of General Internal Medicine & Health Services Research, David Geffen School of Medicine at university of california los angeles |
| Ron D Hays | Fielding School of Public Health, university of california los angeles |